Kink-preventer for silk-spinning machines



(No Model.) Q

I J. A. CHAPMAN.

, KINK PREVENTER FOR SILK SPINNING MACHINES. I No. 384,890.Pat'entedJ'une 19, 1888.

.To all whom, it may concern.-

UNITED STATES PATENT OFFICE.

JGSEPH A. CHAPMAN, OF NE\V LONDON, OONIIEO'IIOUT.

KlNK-PREVENTER FOR SILK-SPINNING MACHINES.

SPECIFICATION forming part of Letters Patent No. 384,890, dated June 19,1888.

Application filed October-29,1887. Srrial No. 253,738. (No model.)

Be it known that I, J OSEPH A. CHAPMAN, a citizen of the United States,residing in the city and county of New London and State of Connecticut,have invented certain new and useful Improvements in Kink-Preventers forSilk- Spinning Machines, which improvements are fully set forth anddescribed in the following specification, reference being had to theaccompanying sheet of drawings, in which- Figure 1 is an elevation of abobbin and a portion of the spindle, and shows also the takeup spool andtension-eye. Fig. 2 is a top end View of the bobbin in Fig. 1, and Fig.3 is an elevation of a bobbin and spindle having connected therewith aflier for use with bobbins having broken or mutilated heads.

My invention relates to machinery for spinning or for doubling andtwisting silk, and is provided to overcome a common tendency on the partof the fine strands of silk to kink as thespindlesarestopped.Thisiscausedchiefly by the fact that the bobbin continues to rotate (byits momentum) after the drawing rolls or take-up spool stop, leaving thesilk slack, and, as a natural consequence, this slack portionimmediately doubles and twists together. Owingto the strands being veryfine and easily broken, the operation of straightening out such kinksbecomes both a tiresome and expensive one.

My invention is intended to overcome this serious difficul ty, andaccomplishes the desired result by providing an annulus of plush orsimilar fibrous springy material around the head of the bobbin.

My simplest and preferred form of construc tion is illustrated in Fig. 1of the drawings, the bobbin proper being indicated by the letter a andthe strand of silk by letter b. c indicates the spindle which carriesthe bobbin; (1, the take-up spool, and ethe tension and guide eye. Thebobbin a in said Fig. 1 has an annular groove turned in the head at theupper or delivery end, and in this groove is cemented or otherwisesecurely fastened, preferably, a narrow strip of plush, 1, whose wirynap projects radially a slight distance beyond the adjacent bobbin-headinto the path of the silken strand. (See Fig. 2.) When the bobbin isswiftly rotated, in the act of spinning or doubling, the fine strand fis drawn off from bobbin a against the elastic force of the plush, whichyields readily to the power of the drawing-rolls; but when the bobbin isstopped the plush acts as a multiple of minute springs, with strengthenough to prevent the strand from slipping forward and becoming slack.By thus preventing the slackening of the strand I avoid all tendency tokink. Y

I am aware of Patent No. 364,516, issued June 7, 1887, in which akink-preventer is made substantially as a cone or sugar-loafshapedextension seated on the bobbin and on which the strand of silk may dropwhen the bobbin stops. In said invent-ion no provision is made forpreventing the slack caused by the momentum of the bobbin, the intent ofsaid prior invention being only to provide a surface adjacent to thewhirling silk on which it may drop and remain extended the instant itstops. In my present device the silk draws constantly across theprojecting nap of the plush and laterally against its elastic force asit is delivered from the bobbin, and, while not unduly restrained bysuch contact with the.

plush, is always in position to be held taut and carried around by saidnap whenever for any reason said bobbin is slackened or stopped.

In a patent, No. 350,345, issued to me Octoher 5, 1886, for akiuk-preventer a fixed ring of plush with nap projecting inward isprovided around the bobbinhead; butsuch a form requires special andexpensive mechanism to be added to the spinning machinery to operatesaid kink-preventing device and I have also found that it is difficultto maintain the bobbin-head and the surrounding fixed ring of plushconcentric with each other. In my pres",

out form these objections are removed.

The strand of silk as it leaves bobbin a draws against the wooden headof said bobbin, and this head or flange sometimes becomes broken ormutilated by hard and constant usage, and if used in such condition thesilk would be quickly broken when brought in contact with such mutilatedportions.

To make mutilated bobbins of my new construction available for furtheruse, I provide what I term a flier, formed of a collar, h, fittedloosely on the spindle, independent of the bobbin, and having radialwiresi'i, the

former of which terminates in an eye, i

through which the silk passes, the latter being ICO bent downward intoengagement with the nap of the plush annulus. Eye f holds the silk fromengagement with the mutilated bobbinits simplest form is, in fact, animproved form of bobbin, and when so used does not require any changeswhatever in the spinning mechamsm.

Having described my invention, I claim as new and wish to secure byLetters Patent A bobbin for silk-spinning, having the flange or head atthe delivery end grooved annularly and. having fixed within said groovea ring of 2 plush or similar material, whose nap projects outward intothe path of the strand of silk, substantially as and for the purposespecified.

JOSEPH A. CHAPMAN. Witnesses:

FRANK H. ALLEN, GILBERT E. Rocnns.

